Thomas eowe



T J ROWE. D 0 ol -Spring Patented Feb. 17, I880.

INVENTOR,

VIII/III;

wrm M ATTORNEYS ESSES V Q RAPHER. WASHINGTON, D, C,

UNITED STATES PATENT OFFICE.

THOMAS ROWE, OF BROOKLYN, NEW YORK.

DOOR-SPRING.

SPECIFICATION forming part of Letters Patent No. 224,730, dated February17, 1880.

v Application filed October 18, 1879.

To all whom it may concern:

Be it known that I, THOMAS ROWE, of

Brooklyn, in the county of Kings and State of Fig. 2 is a sideelevation, partly in section;

and Figs. 3, 4,5, 6, 7, 8, and 9 are detail views.

My presentinvention relates to door-sprin gs; and the improvementconsists in the construe tion and arrangement of parts, as will be fullyset forth in the following description, and particularly pointed out inthe claim.

In the accompanying drawings, A A designate two cylindrical metalcasings, which inclose right and left springs B B, the said casingsbeing formed integral with or secured to a base-plate, O. The caps whichclose the outer ends of the casings A are formed by the metal bracketsD, which are'adapted to be secured by means of. belts or screws to thedoor or frame, and the outer ends of the springs are bent so as toengage witlfnotches or recesses formed by studs (1, a projecting fromthe inner faces of the brackets.

E E designate pins which are passed through the casings and brackets, soas to secure the parts firmly together.

F designates a cylindrical block, formed with a series of round, square,or oblong holes, G, for the reception of a pin, H. .This block, as shownin Fig. 7, is formed with the short 40 journals I, which are recessed,so as to engage with the bent inner ends of the springs, in which casethe block will be of sufficient length to extend into both of .theadjacent ends of the two separated casings A A.

I may, however, arrange this part of the device as shown in Figs. 4 and5, in which-the block F is fitted upon the square part of a shaft whichhas its journal ends I notched or recessed, so as to engage with thebent ends of the springs. In this arrangement thimbles L will he slippedupon the shaft, one at each side of the block. l V

M designates a bar, which is formed with a bifurcated hook-shaped end,N, adapted to fit upon the block F (shown in Figs. 7 and 8) or upon thethimbles L, (shown in Figs. 2' and 3.) When said bar Mis fitted eitherupon the cylinder-block or upon the thimbles the pin H is set in one ofthe holes G, so as to project outward between the tines of thebifurcated end N of the bar.

0 designates a roller, which is jonrnaled in a suitably-form ed bracket,P, adapted to be secured to the door or casing.

The resiliency of the springs maintains the pin H against the bar M, andhence holds the said bar upon the roller; and it will be found thatwhile the hook end of the bar embraces but one-half of the circumferenceof the cylindrical block or thimbles, this action of the pin against thebar will effectively maintain the same in connection with the block orthimbles.

As the door is opened the bar is thrown outward while the roller travelsalong upon the.

same, and so soon as the door is released the spring-power will act uponthe same to close it in the manner above set forth.

What I claim, and desire to secure by Letters Patent, is-

The springs B, arranged within the casings A, in combination with thecylindrical block F and the bar M, formed with a curved bifurcated end,adapted to be fitted in place between the inner adjacent ends of thecasings, substantially as shown and specified.

In testimonythat I claim the above I have hereunto subscribed my name inthe presence of two witnesses.

THOMAS ROWE. Witnesses:

FRANCIS S. VAN BosKEEoK, THoMAs ROWE, Jr.

